Finding the Third Proportional to 179.72 and 389.81

Step by Step Solution

1. Step 1: Write the proportion equation
   179.72 : 389.81 = 389.81 : x
2. Step 2: Convert to fraction form
   179.72/389.81 = 389.81/x
3. Step 3: Cross multiply
   179.72x = 389.81 × 389.81
4. Step 4: Simplify right side
   179.72x = 151,953.79
5. Step 5: Solve for x
   x = 151,953.79/179.72
6. Step 6: Final answer
   x = 845.51